Why does my Trailer Sway when it's Empty?

August 26, 2024

Driving a trailer when it's empty can sometimes lead to a frustrating and potentially dangerous situation known as trailer sway. This unexpected swaying or fishtailing can catch drivers off guard, especially when the trailer is not loaded. In this blog, we'll explore the reasons behind trailer sway when the trailer is empty and how you can prevent it.

A tanker truck is driving down a highway.

Understanding Trailer Sway

What is Trailer Sway?

Trailer sway occurs when the trailer begins to move side to side behind your towing vehicle. This can happen due to various factors, such as wind, uneven road surfaces, or sudden steering movements. When a trailer is empty, it’s particularly vulnerable to sway because it lacks the weight needed to stabilize it.

Why Does Trailer Sway Happen More When Empty?

An empty trailer has less weight pressing down on the tires, which means there's less friction keeping the trailer stable on the road. Additionally, without a load, the trailer's center of gravity is higher, making it more susceptible to swaying when encountering wind gusts or changes in road conditions.

Common Causes of Trailer Sway

Improper Weight Distribution:

When a trailer is loaded improperly or left empty, the balance is off, leading to instability. Even a slight imbalance can cause sway.


Suspension Issues:

Worn or inadequate suspension systems in either the towing vehicle or the trailer itself can increase the likelihood of sway, particularly when the trailer is empty.


Tire Pressure:

Incorrect tire pressure in the trailer or towing vehicle can also contribute to sway. Tires that are over or under-inflated don’t provide the necessary grip on the road.


High Speeds:

Driving too fast can amplify any instability in an empty trailer, making it more prone to sway. Keeping speeds within recommended limits is essential, especially when towing an empty trailer.


Environmental Factors:

Strong winds, uneven roads, and other environmental factors can cause an empty trailer to sway, as it doesn’t have the weight to resist these external forces.

Preventing Trailer Sway

Ensure Proper Weight Distribution:

Even if your trailer is empty, consider loading some weight to help distribute it more evenly across the axles. If that's not an option, ensure that the trailer is level with the ground when hitched to your vehicle.


Check and Maintain Your Suspension System:

Regularly inspect your suspension system to ensure it’s in good condition. A well-maintained suspension can help absorb road shocks and minimize sway.


Monitor Tire Pressure:

Always check the tire pressure before hitting the road. Properly inflated tires are crucial for maintaining stability, whether your trailer is empty or loaded.


Drive Carefully:

Maintain safe speeds and avoid sudden movements when towing an empty trailer. Gradual steering and braking can help reduce the chances of sway.


The Role of a Quality Suspension System

A reliable suspension system is one of the best defenses against trailer sway. At Cush Suspensions, we offer top-of-the-line suspension systems designed to keep your trailer stable, whether loaded or empty. Our solutions are engineered to provide the necessary support and stability, ensuring a smooth and safe ride every time.

Enhance Your Trailer's Stability Today

If you're experiencing trailer sway, especially when driving empty, it’s time to consider upgrading your suspension system. Cush Suspensions offers industry-leading solutions tailored to your needs. Contact us today to learn more about how we can help keep your trailer stable and safe on the road.

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